/*广告公用*/
.jy_ad {position: relative; overflow: hidden;}
.jy_ad ul {position: absolute; top: 0; left: 0; overflow: hidden; margin:0; padding:0;}
.jy_ad li {float: left; display: none; list-style:none;}


/* 广告尺寸 */
.size_250_250, .size_250_250 img {width: 250px; height: 250px;}
.size_300_300, .size_300_300 img {width: 300px; height: 300px;}


